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тАО05-22-2002 02:57 PM
тАО05-22-2002 02:57 PM
Enabling Large File Sizes
I have a requirement to create a large export file from an oracle db and migrate the file to nt 4.0. I could do this creating a named pipe on the export and go directly to tape, but havent figured out how I would then read that on nt 4.0? So a better option would be to enable large file size support.
Please advise on the process under hp unix 11.0 .
# fstyp -v /dev/vg01/lvol1
vxfs
version: 3
f_bsize: 8192
f_frsize: 2048
f_blocks: 4608000
f_bfree: 808847
f_bavail: 808847
f_files: 40960
f_ffree: 1073792296
f_favail: 1073792296
f_fsid: 1073807361
f_basetype: vxfs
f_namemax: 254
f_magic: a501fcf5
f_featurebits: 0
f_flag: 0
f_fsindex: 5
f_size: 4608000
Any caveats or issues? Any LVM requirements?
Thanks in advance,
Kurt
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тАО05-22-2002 03:01 PM
тАО05-22-2002 03:01 PM
Re: Enabling Large File Sizes
To create a filesystem with large file support
newfs -F vxfs -o largefiles /dev/vg03/rlvol1
Using the above option will allow support of files upto 128gig
Regards
Steve
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тАО05-22-2002 03:05 PM
тАО05-22-2002 03:05 PM
Re: Enabling Large File Sizes
To convert to largefiles ..
1) Umount the FS on /dev/vg01/lvol1
2) Run this ..
# fsadm -F vxfs -o largefiles /dev/vg01/rlvol1
==> take note use "raw"
If you have OnlineJFS, this can be done on the fly..
# fsadm -F vxfs -o largefiles /
Check the "f_flag" now, it should be set to 16. Or simply run ..
# fstyp /dev/vg01/lvol1
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тАО05-22-2002 03:48 PM
тАО05-22-2002 03:48 PM
Re: Enabling Large File Sizes
Firstly, "f_flag=0" hence that tells me /dev/vg01/lvol1 is not setup to support largefiles.
I need to add one more step, after you have converted to largefiles support, remember to edit /etc/fstab file to reflect this change .. for example an existing entry might look like this ..
/dev/vg01/lvol1 /dirA vxfs rw,suid,nolargefiles,delaylog .....
Change the "nolargefiles" to "largefiles". If you don't do this the FS might not mount automatically after each reboot.
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тАО05-22-2002 04:18 PM
тАО05-22-2002 04:18 PM
Re: Enabling Large File Sizes
# fsadm -F vxfs -o largefiles /directory_lv_is_mounted
So if you LV is mounted to /testdir then:
# fsadm -F vxfs -o largefiles /testdir
This should work without having to unmount the LV.
As SK said, be sure you change your /etc/fstab entry so that largefiles are enabled the next time you reboot as well.